Journal
EUROPEAN PHYSICAL JOURNAL B
Volume 64, Issue 2, Pages 153-158Publisher
SPRINGER
DOI: 10.1140/epjb/e2008-00303-x
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Funding
- Key Program of Educational Department [07A070]
- Natural Science Foundation [08JJ6001]
- Scientific Research Foundation of Guangxi University [X071117]
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Native vacancy defects in typical strongly correlated oxides NiO have been investigated using the GGA+U method. The defect formation energies under different conditions are determined and magnetisms induced by vacancies are studied. Our results indicate that the predominant defect is Ni vacancy under oxygen-rich condition and the most stable ionization state varies with different Fermi level. The Ni vacancy forms shallow acceptor, suggesting the native p-type conductivity originates from the cation vacancy. In addition, after introducing a Ni vacancy, a half-metallic antiferromagnet or half-metallic ferromagnet can form according to different ionization state of cation vacancy.
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